Traction-wheel.



H. lo. jcLoYD.

Patented sept. 2919o's TBAGTION WHEEL AR'PLIoATIoN FILED JAN. a, 190s.

.z Union City, Ain" th'e .countyr Stateeof lndianai,

` 'Y ments in traction Wheels for traction engines,vr

and its objectistoqprovide a Wheel in which the tractors are movableradially or substanl j tially radiallyso as to be projected beyond theperiphery ofthe lWheel mposition to en. 4g`agethe ground and thenfberetracted so` that thelr outer ends are Within'thegrim of the Vwheel. Bthis actionof the tractors mud-or dirtw ich-.tends toclingfto the periphery of the wheel andthus clog the trac-al .tors from gri pingthe-roadwajjs -caused-to beloosened rom theperiphery of the wheel and inmany cases spontaneously falls therefrom. In order to -rnorethoroughly/clean the Wheel a scraper is` provided. l

The l/resent invention com rises means for progressively lprojl'ectingan retracting the tractors as the W eel revolves, with `means forsetting .the relative points of projection Y and retraction in bothtraction wheelsgy'syirnulftaneously. In; order to strengthen thetrac-"tors and also the rims of the'wheels through l which th 'moveftle'tractor heads'aremade bifurcate sothat thelslots through which.they'pass 'ma be' dividedby a strengthening e web, thus ad ing to theWheel at thispoint. The invention `and'itsgpurposes will be more clearlunderstood fromja consideraresisting powerf: ofthe tion oftheollowingjdetail description taken -La bar 1,4 which'may be ta en as onFigi 2 is 'a section on the lline :I3-x ol:V Fig. 1.

elferrin in connection with the accompanying* draw,-`

ings flIIlIlg il part of this specification, in

which drawings f made in accordance with my invention, and

fr to the'drawin s, there's-sh,

side bars of the frame of fa tractiony rigine and finay be considered asindicativey the entire engine frarne. )Suitably jour alefd in this frameis the main 'axlef2. a, e this vaxle there is mounted a hub 3ror'rr'fwhich radiates s ok'es 4 terminating at the'rinr" of Vthe wheewhich rim is suchas iaulsublly used ilpon tractionvwheels except'that'ft-hetractors are omitted.` `Exten'dmg centrally llipplitxaigftnmgannwy s, 190s..- serial N0; 409,839.

.tractor stems. `T be replaced by pivot bolts. At one side,

Figure 1 is an 'elevation of a? traction wheel M I, -ru

i Patented sept. 29, 1908.

around the innerface ofthe rir'nj is an annular r1b. 61nto which thespokes-4 merge! vMid- "way 'between lthe spokes the rim is providedwithtwo matched series of slots 7, 7 andeach -pair of slots receives thelegs 8, 8 of a tractor 9. formed on one end of the stem 10,

i, Exterior to the hub 3 there is fast u on the axle by means of asetscrew 11, anot er hub 12 on which is formed an' eccentric 13.

`This eccentric isformed with an annular peripheral ange 14. Seated onthe eccentric 13 on each side ofthe flange 14, are two annular plates15, 16, theplate lbeing providedwith a lateral annular collar 17restingA on'the iiange 14 ofthe eccentric. The plates and 16 are heldtogether by suitable bolts 18 or otherwise. That end of the stem 10 ofeach tractor remote from the tractor is housed between. the two plates15 and 16 and may be formed with trunnions 19 enfaging in suitablymatched suplports for the ends of the e trunnions may of course eachlate 15 and 16 is formed with an ear 20, and tllie plates are joined bybolts or rivets 20 separated suficlently to straddle one of the s okes4. These rivets 20 farey long enoug tocarry rollers 21 on each sideofthe s oke 4 which is straddled by these rivets.

he two 4plates 15 and 16 are thus constrained` to rotate with the wheelbut are free to' move radially with reference to the wheel, Y beingguided by the particular spoke 4 straddl'ed by the rollers 21 and rivets20 Y.

Fast uponthe sidebar 1 is a rack segment 22, and fast upon the axle 2`isthe hubx23jof y a lever 2 4, .this hub beingvsecured to the axle by aset screw 25. The lever is so arranged as to engage notches 26h-formedin one side face of the vsegment 22. The traction wheel may be providedwith a gear 27 by meansof whichpoweris imparted to it.

Let 1t .now be assumed that then arts are in the position'shown in Fig;A1, Wit the eccentric having its longest radius downward. In thisposition the rings 15 and 16 will be 1n their lowermost position and'the tractors 9 will have their ends eccentric to the rim of the wheelso that the lowermost tractors will pro- -ject beyond the rim of thewheel While the uppermost tractors will be retracted to the'. reatest,extent and the other tractors will ie retracted proportionately. As thewheel rotates, those tractors which are brought lowermost will beprojected and will be later 5 this rotation so that its longest Aradiusis no longer downward but slants toward the left, as viewed in Fig. 1.It is obvious thatgt'he tractors are 'projected sooner than'in theposition shown in Fig. 1 and begin to be rejected to their greatestextent, and conse- .qiientl this posltion is best adapted for soft grounWhenl the lever 24 is moved -toward the right, as viewed in Fig. 1, theexl tent of projection of the tractorsby the time they come into contactwith the ground, is lessened. This is the osition best adapted forharder ground, and or the hardest ground or roadway the lever may bethrown still furthertoward the right, as viewed in Fig. 1.

y IThe ladjiistnient Aof the lever is such that the 'tractors may besotimed in their rojection as to be withdrawn before, reaciiing that pointwhere the wheel is'in contact with the roadway, which would be theposition for moving the traction engine upon paved roads or streets. j

It is to be observed that the frame 1 and the hub of the eccentric serveto hold the traction wheel hub 3 in place on the axle about which latterthe hub 8 is free to rotate. c When the tractors are withdrawn into the5 rim of the Wheel, any mud or dirt which may cling to them is scrapedofi by the edges of the slots 7. However, more or less mud willsometimes clingto the rim of the Wheel, and for this purpose there isrovided a scraper 28 fast on the frame 1 an having a scraping head 29 inclose relation to the rim of the wheel but in position to engage thesame at a point where the tractors are always retracted. By fixing thescraper to a rigid part of the frameV it serves the pu ose of a scraperwithout` springing away rom the Wheel and may, therefore, be adjustedinto close relation with the wheel Without danger yof catching thereon.

The axlev 2 is in practice provided With'a wheel at each end, as isusual, and the tractors are provided in each wheel so that the tractedbefore they'reach the ground. VIn the position shown in Fig.. 1, thetractors when in contact with the ground are pro.

v1.2 Ati-action wheel provided with a rim having an inwardly-pro'ectingannular rib formed in one piece .wit the rim, said rim having matchedslots extendingthrough it in annular series, one on each side, of therib, tractors having ,bifurcated heads arranged' laterally withreference to the wheel rim vand adapted to move through the slots insaid rim, and means for causing the progressive vprojection andretraction ofethe tractors as the wheel revolves.

3. A traction wheel provided with a rim, spokes and hub in fixedrelation one to the other, tractors movable progressively through therim and an eccentrically mounted carrier for the inner ends of thetractors, and means for holding the eccentric mounting of the tractorsto a spoke of the traction wheel for rotation .therewith but permittinglongituldil nal movement of the tractor holder with relation to saidspoke.

4. A traction Wheel provided with a rim, spokes and hub in fixedrelationone to the other, tractorsmovable progressively through the rimand an eccentrically mounted earner for the inner ends of the tractors,and means for holding the eccentric mounting of the tractors to a spokeof the traction wheel for rotation therewith but permittin longitudinalmovement of the tractor hol er with relation to said spoke com risingrollers on each side of the'spoke .and aving their j our-y nals on andprojecting from the tractor carrier. I

In testimony that I claim the foregoing as my own, I have hereto ailixedmy signature in the presence of two witnesses.

HENRY o. cLoYD.

Witnesses:

GERTRUDE CLoYD, S. R. BELL.

